JP5153352B2 - Cleansing cosmetic composition - Google Patents

Description

  The present invention relates to a cosmetic composition having a lamellar liquid crystal structure, and more particularly to a cleansing cosmetic composition used for makeup removal.

  Cleansing cosmetics are cosmetics whose main purpose is to remove oily makeup cosmetics. In recent years, makeup cosmetics with significantly improved resistance to water and sweat have been widely used, and it is difficult to sufficiently remove makeup with only a surfactant-type facial cleanser. Therefore, as a cleansing cosmetic, a type (solvent type) in which a makeup component is dissolved and dispersed in an oil component and then removed by wiping or washing off is widely used.

  Examples of solvent-type cleansing cosmetics include cream-type, emulsion-type, lotion-type, gel-type, and oil-type dosage forms. Among these, the cream type and the oil type have a feeling of oil film (sticky feeling) after wiping or washing away, so that further face washing with a face washing foam is required. Further, the cream type and the oil type generally have a problem that they cannot be used with wet hands. The emulsion type forms an o / w type emulsion and has less oily components than the cream type, and therefore generally has a low detergency. The lotion type removes oil stains with a surfactant, alcohol, etc., and therefore has a low detergency, and is used mainly in cotton for wiping. As the gel type, an o / w type emulsified type or a gel formed with a water-soluble polymer is known.

On the other hand, liquid crystal type cleansing cosmetics are attracting attention as having high detergency and good washability. For example, JP 2006-249011 A and JP 2007-23025 A disclose cleansing cosmetics having a lamellar liquid crystal structure (Patent Documents 1 and 2).
JP 2006-249011 A JP 2007-23025 A

  Cleansing cosmetics with a lamellar liquid crystal structure have the advantage that they are easy to adapt to makeup stains and can be removed with a single water wash. In particular, when stored at low temperatures, the lamellar liquid crystal structure is impaired, and the components are separated and precipitated.

  An object of the present invention is to provide a lamellar crystal type cleansing cosmetic composition which has excellent detergency of makeup stains and washability with water, and has good stability that can withstand long-term storage.

  As a result of intensive research, the present inventors have found, as a means for solving the above-mentioned problems, specifically good properties in cleansing cosmetics containing both monoglyceryl mono or dioleate and polyglyceryl mono or diisostearate as components. The present invention has been completed.

  That is, according to one aspect of the present invention, a cosmetic composition comprising a component A that is polyglyceryl mono or dioleate; a component B that is polyglyceryl mono or diisostearate; water; and an oily component, and having a lamellar liquid crystal structure. Things are provided.

BEST MODE FOR CARRYING OUT THE INVENTION

  The polyglyceryl mono- or dioleate used as component A in the present invention is not particularly limited, but polyglyceryl dioleate is preferred from the viewpoint of forming a lamellar liquid crystal structure and low-temperature stability. Moreover, as a component A in this invention, 2-10 are preferable, 5-10 are more preferable, and 5-8 are more preferable from the point of formation of a lamellar liquid crystal structure, and a low temperature stability, for example. .

  In the present invention, the polyglyceryl mono- or dioleate preferably has a hydroxyl value of, for example, 700 to 1500, more preferably 800 to 1200, and an HLB of, for example, 2 to 16, preferably 10. More preferably, it is ~ 15. When the hydroxyl value and HLB of polyglyceryl mono- or dioleate are within these ranges, a cosmetic composition excellent in formation of a lamellar liquid crystal structure and low-temperature stability can be obtained.

  The polyglyceryl mono- or diisostearate used as component B in the present invention is not particularly limited, but polyglyceryl diisostearate is preferred from the viewpoint of formation of a lamellar liquid crystal structure and low-temperature stability. In addition, as Component B in the present invention, from the viewpoint of formation of a lamellar liquid crystal structure and low-temperature stability, for example, the polymerization degree of glycerin is preferably 2 to 10, more preferably 6 to 10, and even more preferably 8 to 10. .

  In the present invention, the polyglyceryl mono- or diisostearate preferably has a hydroxyl value of 700-1500, more preferably 800-1200, and HLB of 3-16, preferably 10-16. More preferably. When the hydroxyl value and HLB of polyglyceryl mono- or diisostearate are within these ranges, a cosmetic composition excellent in formation of a lamellar liquid crystal structure and low-temperature stability can be obtained.

  In the present specification, the “degree of polymerization” is a value calculated by a method known in the art based on the hydroxyl value measured for Component A and Component B. The hydroxyl value can be measured by a method known in the art, for example, a method based on “quasi-drug raw material standard, general test method”.

In the present specification, “HLB” indicates a balance between hydrophilicity and lipophilicity, and is a value calculated using the Griffin method.
HLB = 20 (1-S / A)
S: Saponification value of polyglycerin fatty acid ester A: Neutralization value of raw fatty acid In another aspect of the present invention, the weight ratio of component A and component B is component A: component B = 2.5: 1. A cosmetic composition as defined herein is provided which is ˜30: 1, in particular 7: 1 to 30: 1. When the weight ratio of component A and component B is within this range, a cosmetic composition excellent in formation of a lamellar liquid crystal structure and stability at low temperatures can be obtained.

The water used for this invention is not specifically limited, For example, distilled water, deionized water, etc. can be used.
The oily component used in the present invention is not particularly limited. For example, ethylhexyl palmitate (octyl palmitate), liquid paraffin, isononyl isononanoate, isotridecyl isononanoate, cetyl octanoate (cetyl ethylhexanoate), squalane and One component selected from glyceryl tri (capryle-caprin) or a mixture of two or more components can be used. In particular, ethylhexyl palmitate, isononanoic acid in terms of formation of a lamellar liquid crystal structure and low-temperature stability It is preferred to use one component selected from isononyl and cetyl octoate, or a mixture of two or more components.

  Although not particularly limited, the weight ratio of the total amount of the component A and the component B to water is, for example, (component A + component B): water = 1.8: 1 to 10: 1, particularly 1.8: 1-6: 1 may be sufficient. Although not particularly limited, the weight ratio of the oily component to water is oily component: water = 5: 1 to 18: 1, particularly 8: 1 to 11: 1. Within such a range, a cosmetic composition excellent in formation of a lamellar liquid crystal structure and low-temperature stability can be obtained.

  In another aspect of the present invention there is provided a cosmetic composition as defined herein further comprising as one or more ingredients selected from sugar alcohols. Examples of sugar alcohols include tritol (eg, glycerin), tetritol (eg, erythritol, etc.), pentitol (eg, arabinitol, xylitol, etc.), hexitol (eg, sorbitol, dulcitol, mannitol, etc.), disaccharide-derived Sugar alcohol (for example, maltitol) can be used, and in particular, hexitol such as sorbitol, maltitol, glycerin, etc. are preferably used from the viewpoint of formation of lamellar liquid crystal structure and low-temperature stability. And a combination of hexitol and / or maltitol is more preferable.

  When hexitol is used in the cosmetic composition of the present invention, the weight ratio of hexitol to water is, for example, hexitol: water = 5: 1 to 0.5: 1, particularly 3: 1-0.5: 1. When maltitol is used in the present invention, the weight ratio of maltitol and water is not particularly limited, and the weight ratio of maltitol and water is, for example, maltitol: water = 5: 1 to 0.5: 1, particularly 3: 1 to 0. .5: 1. When glycerin is used in the present invention, although not particularly limited, the weight ratio of glycerin to water is, for example, glycerin: water = 5: 1 to 0.5: 1, particularly 3: 1 to 0.5: 1.

  The lamellar liquid crystal structure of the present invention is not particularly limited. For example, water is retained in the hydrophilic portion of the surfactant (component A and component B) molecules, and the oil component is retained in the lipophilic portion. In this state, the molecules are arranged in layers. The cosmetic composition of the present invention having a lamellar liquid crystal structure is a transparent liquid or gel, and is preferable as the appearance and shape of the cosmetic.

  As long as the lamellar liquid crystal structure is maintained, the cosmetic composition of the present invention further comprises lower alcohols, salts, antioxidants, ultraviolet absorbers, plant extracts, moisturizers, bactericides, anti-inflammatory agents, antiseptics, A coloring agent, a fragrance | flavor, a thickener, a solvent, etc. may be included.

The cosmetic composition of the present invention is not particularly limited. For example, the viscosity may be 10 to 3000 Pa · s at 25 ° C., and the viscosity may be 10 to 1500 Pa · s particularly at 25 ° C.
Although the cosmetic composition of this invention is not specifically limited, For example, it can be preferably used as a cleansing cosmetic.

  The embodiment of the present invention will be specifically described below by showing examples, but the present invention is not limited to the examples.

Cosmetic compositions having the composition shown in Tables 2 to 4 (Examples 1 to 26), Table 5 (Comparative Examples 1 to 10) and Tables 6 to 8 (Prescription Examples 1 to 54) were prepared. Tests were conducted to confirm the detergency, ease of rinsing with water (washability) and storage stability of the compositions of Examples and Comparative Examples.
(reagent)
The following reagents were used as raw materials for the composition.

Sorbitol, glycerin and ethylhexyl palmitate were purchased from Towa Kasei Kogyo Co., Ltd., Sakamoto Yakuhin Kogyo Co., Ltd. and Croda Japan Co., Ltd., respectively. Distilled water was used as the water. Maltitol was purchased from Towa Chemical Industry Co., Ltd. In addition, isononyl isononanoate, isotridecyl isononanoate, cetyl octoate, and glyceryl tri (capryl / capric) acid were purchased from Nisshin Oilio Group, Squalane from Nikko Chemicals, and liquid paraffin from Kaneda.
(Preparation method)
The components shown in Tables 2 to 8 below were heated and dissolved and mixed at 70 to 75 ° C. It was cooled and stirred to 30 ° C. or lower to prepare a cosmetic composition.
(Evaluation method)
1) Water washability 0.5 ml of the cosmetic composition prepared on the back of the hand coated with lipstick was taken, massaged for about 1 minute, and then washed with tap water having a constant amount of water and water pressure to confirm detergency. Furthermore, sensory evaluation was performed on the feel to the skin after washing. Sufficient detergency was confirmed in all compositions prepared as examples and comparative examples. Moreover, the feeling of the skin after washing | cleaning was also refreshing, and the sliminess after washing | cleaning was not confirmed about all the compositions.

2) Formation of liquid crystal structure and storage stability Formation of the liquid crystal structure during preparation of the composition was visually confirmed. Evaluation was made as ◯ if a liquid crystal was formed, and × if a liquid crystal was not formed. Further, the prepared composition was allowed to stand at 5 ° C. for 1 month. After standing at 5 ° C. for 1 month, it was evaluated as “good” if stable, and “×” if separated. The evaluation results are shown in Tables 2-5.

  The compositions of Examples 1-26, which contain mono or polyglyceryl dioleate; polyglyceryl mono or diisostearate; water; and oily components as components, all formed a liquid crystal structure during the preparation (evaluation: “◯”) The liquid crystal structure was maintained even after 1 month, and no separation or sedimentation occurred. In addition, when long-term storage stability was also evaluated, the compositions of Examples 1, 4, 5, 7, 20-23 and 26 containing polyglyceryl dioleate and polyglyceryl diisostearate were obtained at 5 ° C. for 2 months. In addition, it was confirmed that the liquid crystal structure was maintained and separation / sedimentation did not occur.

  Furthermore, the same excellent stability was confirmed in the compositions in which sorbitol contained as a component of the compositions of Examples 1, 4, 5, 7, 20 to 23 was replaced with glycerin or maltitol. Among the sugar alcohols used as additives, it was confirmed that the composition using sorbitol was most stable (stable at 5 ° C. for 3 months).

  In addition, in the composition in which ethylhexyl palmitate contained as a component of the compositions of Examples 1, 4, 5, 7, 20 to 23 was replaced with isononyl isononanoate or cetyl octoate, similarly excellent stability was obtained. confirmed. Among the oily components used, it was confirmed that the composition using ethylhexyl palmitate was most stable (stable at 5 ° C. for 3 months).

  On the other hand, the compositions of Comparative Examples 1 to 7 formed a liquid crystal structure at the time of preparation, but the components of Comparative Examples 8 to 10 were separated and did not become liquid crystals at the time of preparation. Further, when Comparative Examples 1 to 7 were stored at 5 ° C. for 1 month, the occurrence of separation and / or sedimentation was confirmed in all the compositions.

  Here, when Example 3, Example 5, Example 6, Formulation Example 1, and Formulation Example 2 are compared, as component A, polyglyceryl dioleate is more glycerin polymerized than polyglyceryl monooleate. It was found that the degree was in the order of 2, 10, 5 to further improve the low temperature stability of the cosmetic composition.

Furthermore, when Example 5, Example 15, Example 19, and Formulation Example 6 are compared, as component B, polyglyceryl diisostearate is more than polyglyceryl monoisostearate, and the degree of glycerol polymerization is 2 or 6 It was found that 10 more improved the low-temperature stability of the cosmetic composition.
(Prescription example)
The cosmetic compositions of the formulation examples shown in Tables 6 to 8 below all formed lamellar liquid crystal structures and exhibited excellent low-temperature stability.

Claims (8)

Water; component B is a di polyglyceryl isostearate is the degree of polymerization of glycerin is 6-10; polymerization degree of glycerin component A is di oleic acid polyglyceryl 5 to 10 contain and oil component, lamellar liquid crystal structure A cosmetic composition comprising: Component A, mono- or diglyceryl dioleate having a degree of polymerization of glycerol of 5-10; Component B, mono- or polyglyceryl of diisostearate having a degree of polymerization of glycerol of 6-10; water; and an oil component It has a liquid crystal structure, the weight ratio of component a and component B, component a: component B = 2.5: 1~30: 1, the cosmetic composition. Component A, mono- or diglyceryl dioleate having a degree of polymerization of glycerol of 5-10; Component B, mono- or polyglyceryl of diisostearate having a degree of polymerization of glycerol of 6-10; water; and an oil component It has a liquid crystal structure further comprises one or more components selected from sugar alcohols, the cosmetic composition. The cosmetic composition according to claim 1 or 2 , further comprising one or more components selected from sugar alcohols. The cosmetic composition according to claim 1 or 3 , wherein the weight ratio of component A and component B is component A: component B = 2.5: 1 to 30: 1. The cosmetic composition according to claim 2 or 3 , wherein component A is polyglyceryl dioleate and component B is polyglyceryl diisostearate.
The cosmetic composition according to claim 3 or 4 , wherein the sugar alcohol is sorbitol. The cosmetic composition according to any one of claims 1 to 7 , which is used as a cleansing cosmetic.